To just have a negative in the late afternoon and next morning?

Could I just not have registered enough to get a peak or did I just not ovulate yet? I did have a little blood tinged discharge when I wipes today.

Glow says ovulation today. It’s been pretty right so far this cycle to line up with opks. Except I didn’t get a high fertility ready until the morning of the 19th. I only tested morning on the 18th and negative.